MX 2004 is the current version of Director. Only updates to
earlier
versions of an application are available for download after
any
particular version is no longer current. There were no
updates to
Director MX that I can remember.

If you are using Director MX and have lost the application,
you may be
able to get a replacement through Adobe's customer service.

Is there any reason you need MX not MX 2004? MX 2004 files
can be opened
in MX if you want to be interchange between versions. I have
a copy of
the trial Windows version of MX. If you desparately need it,
feel free to
email me offlist.